Dell PowerVault TL4000 - Manual (Page 30)

Speed Matching
To improve system performance, the Ultrium 3, Ultrium 4, Ultrium 5, and Ultrium
6 Tape Drives use a technique called speed matching to dynamically adjust its native
(uncompressed) data rate to the slower data rate of the attached server.
Channel Calibration
The channel calibration feature of the Ultrium 3, Ultrium 4, Ultrium 5, and Ultrium
6 Tape Drives customizes each read/write data channel for optimum performance.
The customization enables compensation for variations in the recording channel
transfer function, media characteristics, and read/write head characteristics.
a77ug008
Figure 1-6. Library drive sled without ESD springs (SCSI sled shown)
a77ug202
1
Figure 1-7. Library drive sled with ESD springs [1] (SAS sled shown)
1-10 Dell PowerVault TL2000 Tape Library and TL4000 Tape Library User's Guide